April 2025 - Devel - libvirt List Archives

[PATCH] virbitmap: Change return type of virBitmapToData to void
by Alexander Kuznetsov 16 Apr '25

16 Apr '25

This function return value is invariant since e59b8f9, so change its type and remove all dependent checks. Found by Linux Verification Center (linuxtesting.org) with Svace. Signed-off-by: Artem Chernyshev <artem.chernyshev(a)red-soft.ru> Signed-off-by: Alexander Kuznetsov <kuznetsovam(a)altlinux.org> --- src/ch/ch_monitor.c | 5 +---- src/hypervisor/domain_driver.c | 4 +--- src/qemu/qemu_driver.c | 3 +-- src/util/virbitmap.c | 6 +----- src/util/virbitmap.h | 2 +- src/util/virhostcpu.c | 4 ++-- tests/virbitmaptest.c | 3 +-- tools/virsh-completer-domain.c | 6 ++---- tools/virsh-domain.c | 3 +-- 9 files changed, 11 insertions(+), 25 deletions(-) diff --git a/src/ch/ch_monitor.c b/src/ch/ch_monitor.c index 0ba927a194..b772eec8a2 100644 --- a/src/ch/ch_monitor.c +++ b/src/ch/ch_monitor.c @@ -1196,10 +1196,7 @@ virCHMonitorGetIOThreads(virCHMonitor *mon, if (!(map = virProcessGetAffinity(iothreadinfo->iothread_id))) goto error; - if (virBitmapToData(map, &(iothreadinfo->cpumap), - &(iothreadinfo->cpumaplen)) < 0) { - goto error; - } + virBitmapToData(map, &(iothreadinfo->cpumap), &(iothreadinfo->cpumaplen)); /* Append to iothreadinfolist */ iothreadinfolist[niothreads] = g_steal_pointer(&iothreadinfo); diff --git a/src/hypervisor/domain_driver.c b/src/hypervisor/domain_driver.c index e2a08d737e..35966a5a8d 100644 --- a/src/hypervisor/domain_driver.c +++ b/src/hypervisor/domain_driver.c @@ -652,9 +652,7 @@ virDomainDriverGetIOThreadsConfig(virDomainDef *targetDef, cpumask = bitmap; } } - if (virBitmapToData(cpumask, &info_ret[i]->cpumap, - &info_ret[i]->cpumaplen) < 0) - goto cleanup; + virBitmapToData(cpumask, &info_ret[i]->cpumap, &info_ret[i]->cpumaplen); } *info = g_steal_pointer(&info_ret); diff --git a/src/qemu/qemu_driver.c b/src/qemu/qemu_driver.c index 6ce949dd07..59ba6cfbf3 100644 --- a/src/qemu/qemu_driver.c +++ b/src/qemu/qemu_driver.c @@ -4787,8 +4787,7 @@ qemuDomainGetIOThreadsLive(virDomainObj *vm, if (!(map = virProcessGetAffinity(iothreads[i]->thread_id))) goto endjob; - if (virBitmapToData(map, &info_ret[i]->cpumap, &info_ret[i]->cpumaplen) < 0) - goto endjob; + virBitmapToData(map, &info_ret[i]->cpumap, &info_ret[i]->cpumaplen); } *info = g_steal_pointer(&info_ret); diff --git a/src/util/virbitmap.c b/src/util/virbitmap.c index e42f5b872c..8a3f33c806 100644 --- a/src/util/virbitmap.c +++ b/src/util/virbitmap.c @@ -637,10 +637,8 @@ virBitmapNewData(const void *data, * Convert a bitmap to a chunk of data containing bits information. * Data consists of sequential bytes, with lower bytes containing * lower bits. This function allocates @data. - * - * Returns 0 on success, -1 otherwise. */ -int +void virBitmapToData(virBitmap *bitmap, unsigned char **data, int *dataLen) @@ -656,8 +654,6 @@ virBitmapToData(virBitmap *bitmap, *dataLen = len; virBitmapToDataBuf(bitmap, *data, *dataLen); - - return 0; } diff --git a/src/util/virbitmap.h b/src/util/virbitmap.h index a9f9d97fd0..a9c0a1a307 100644 --- a/src/util/virbitmap.h +++ b/src/util/virbitmap.h @@ -91,7 +91,7 @@ virBitmap *virBitmapNewCopy(virBitmap *src) ATTRIBUTE_NONNULL(1); virBitmap *virBitmapNewData(const void *data, int len) ATTRIBUTE_NONNULL(1); -int virBitmapToData(virBitmap *bitmap, unsigned char **data, int *dataLen) +void virBitmapToData(virBitmap *bitmap, unsigned char **data, int *dataLen) ATTRIBUTE_NONNULL(1) ATTRIBUTE_NONNULL(2) ATTRIBUTE_NONNULL(3); void virBitmapToDataBuf(virBitmap *bitmap, unsigned char *data, size_t len) diff --git a/src/util/virhostcpu.c b/src/util/virhostcpu.c index 3b4a11effb..80819d83e6 100644 --- a/src/util/virhostcpu.c +++ b/src/util/virhostcpu.c @@ -1110,8 +1110,8 @@ virHostCPUGetMap(unsigned char **cpumap, if (!(cpus = virHostCPUGetOnlineBitmap())) goto cleanup; - if (cpumap && virBitmapToData(cpus, cpumap, &dummy) < 0) - goto cleanup; + if (cpumap) + virBitmapToData(cpus, cpumap, &dummy); if (online) *online = virBitmapCountBits(cpus); diff --git a/tests/virbitmaptest.c b/tests/virbitmaptest.c index 27b6c13114..709c62ab54 100644 --- a/tests/virbitmaptest.c +++ b/tests/virbitmaptest.c @@ -339,8 +339,7 @@ test5(const void *v G_GNUC_UNUSED) ignore_value(virBitmapSetBit(bitmap, 2)); ignore_value(virBitmapSetBit(bitmap, 15)); - if (virBitmapToData(bitmap, &data2, &len2) < 0) - return -1; + virBitmapToData(bitmap, &data2, &len2); if (len2 != sizeof(data) || data2[0] != 0x05 || diff --git a/tools/virsh-completer-domain.c b/tools/virsh-completer-domain.c index 0a3a113dca..b020d87f49 100644 --- a/tools/virsh-completer-domain.c +++ b/tools/virsh-completer-domain.c @@ -794,8 +794,7 @@ virshDomainVcpulistViaAgentCompleter(vshControl *ctl, if (!(onlineVcpus = virBitmapParseUnlimited(onlineVcpuStr))) goto cleanup; - if (virBitmapToData(onlineVcpus, &onlineVcpumap, &dummy) < 0) - goto cleanup; + virBitmapToData(onlineVcpus, &onlineVcpumap, &dummy); if (enable) { offlinableVcpuStr = vshGetTypedParamValue(ctl, &params[2]); @@ -803,8 +802,7 @@ virshDomainVcpulistViaAgentCompleter(vshControl *ctl, if (!(offlinableVcpus = virBitmapParseUnlimited(offlinableVcpuStr))) goto cleanup; - if (virBitmapToData(offlinableVcpus, &offlinableVcpumap, &dummy) < 0) - goto cleanup; + virBitmapToData(offlinableVcpus, &offlinableVcpumap, &dummy); lastcpu = virBitmapLastSetBit(offlinableVcpus); cpulist = g_new0(char *, nvcpus - virBitmapCountBits(onlineVcpus) + 1); diff --git a/tools/virsh-domain.c b/tools/virsh-domain.c index ceff6789d8..a2e30a0fa9 100644 --- a/tools/virsh-domain.c +++ b/tools/virsh-domain.c @@ -7420,8 +7420,7 @@ virshParseCPUList(vshControl *ctl, int *cpumaplen, } } - if (virBitmapToData(map, &cpumap, cpumaplen) < 0) - return NULL; + virBitmapToData(map, &cpumap, cpumaplen); return cpumap; } -- 2.42.4

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[PATCH] nss: Fix memory leak in findLease
by Alexander Kuznetsov 15 Apr '25

15 Apr '25

path is allocated by asprintf() and must be freed later if realloc() fails or at the end of each while() iteration Move the free() call out of LIBVIRT_NSS_GUEST macro and add another one if realloc() fails Found by Linux Verification Center (linuxtesting.org) with Svace. Reported-by: Dmitry Fedin <d.fedin(a)fobos-nt.ru> Signed-off-by: Alexander Kuznetsov <kuznetsovam(a)altlinux.org> --- tools/nss/libvirt_nss.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) diff --git a/tools/nss/libvirt_nss.c b/tools/nss/libvirt_nss.c index d79a00a1b0..190cc7a3dd 100644 --- a/tools/nss/libvirt_nss.c +++ b/tools/nss/libvirt_nss.c @@ -141,8 +141,11 @@ findLease(const char *name, goto cleanup; tmpLease = realloc(leaseFiles, sizeof(char *) * (nleaseFiles + 1)); - if (!tmpLease) + if (!tmpLease) { + free(path); goto cleanup; + } + leaseFiles = tmpLease; leaseFiles[nleaseFiles++] = path; #if defined(LIBVIRT_NSS_GUEST) @@ -155,8 +158,8 @@ findLease(const char *name, free(path); goto cleanup; } - free(path); #endif /* LIBVIRT_NSS_GUEST */ + free(path); } errno = 0; -- 2.42.4

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[PATCH] virNWFilterIncludeDefToRuleInst: Prevent potential double g_free
by Alexander Kuznetsov 15 Apr '25

15 Apr '25

If virNWFilterDefToInst returns -1, it has already called virNWFilterInstReset. Remove the additional call to prevent a double g_free Found by Linux Verification Center (linuxtesting.org) with Svace. Reported-by: Dmitry Fedin <d.fedin(a)fobos-nt.ru> Signed-off-by: Alexander Kuznetsov <kuznetsovam(a)altlinux.org> --- src/nwfilter/nwfilter_gentech_driver.c | 4 +--- 1 file changed, 1 insertion(+), 3 deletions(-) diff --git a/src/nwfilter/nwfilter_gentech_driver.c b/src/nwfilter/nwfilter_gentech_driver.c index 41f270bb7c..f7a909bdc0 100644 --- a/src/nwfilter/nwfilter_gentech_driver.c +++ b/src/nwfilter/nwfilter_gentech_driver.c @@ -293,10 +293,8 @@ virNWFilterIncludeDefToRuleInst(virNWFilterDriverState *driver, tmpvars, useNewFilter, foundNewFilter, - inst) < 0) { - virNWFilterInstReset(inst); + inst) < 0) return -1; - } return 0; } -- 2.42.4

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[PATCH] virsh: prevent potential NULL dereference
by Alexander Kuznetsov 15 Apr '25

15 Apr '25

virXPathString() can return NULL so we need to check it before calling strcmp() Found by Linux Verification Center (linuxtesting.org) with Svace. Reported-by: Dmitry Fedin <d.fedin(a)fobos-nt.ru> Signed-off-by: Alexander Kuznetsov <kuznetsovam(a)altlinux.org> --- tools/virsh-completer-domain.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/tools/virsh-completer-domain.c b/tools/virsh-completer-domain.c index 0a3a113dca..abacfd04c1 100644 --- a/tools/virsh-completer-domain.c +++ b/tools/virsh-completer-domain.c @@ -891,7 +891,7 @@ virshDomainConsoleCompleter(vshControl *ctl, ctxt->node = parallels[i - nserials]; type = virXPathString("string(./@type)", ctxt); - if (STRNEQ(type, "pty")) + if (!type || STRNEQ(type, "pty")) continue; tmp[offset++] = virXPathString("string(./alias/@name)", ctxt); -- 2.42.4

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[PATCH v2 0/2] conf: use const virDomainDef pointers
by Roman Bogorodskiy 15 Apr '25

15 Apr '25

Changes since v1: - Split domain_conf and bhyve changes into separate commits - Convert virDomainNetNotifyActualDevice() as well Roman Bogorodskiy (2): conf: use const virDomainDef pointers bhyve: use const virDomainDef pointer in bhyveBuildNetArgStr() src/bhyve/bhyve_command.c | 2 +- src/conf/domain_conf.c | 10 +++++----- src/conf/domain_conf.h | 8 ++++---- 3 files changed, 10 insertions(+), 10 deletions(-) -- 2.49.0

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[PATCH] bhyve: capabilities: advertise RNG device support
by Roman Bogorodskiy 14 Apr '25

14 Apr '25

Signed-off-by: Roman Bogorodskiy <bogorodskiy(a)gmail.com> --- src/bhyve/bhyve_capabilities.c | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/src/bhyve/bhyve_capabilities.c b/src/bhyve/bhyve_capabilities.c index 37ae5d2872..36a092a819 100644 --- a/src/bhyve/bhyve_capabilities.c +++ b/src/bhyve/bhyve_capabilities.c @@ -109,6 +109,16 @@ virBhyveDomainCapsFill(virDomainCaps *caps, VIR_DOMAIN_CAPS_ENUM_SET(caps->video.modelType, VIR_DOMAIN_VIDEO_TYPE_GOP); } + if (bhyvecaps & BHYVE_CAP_VIRTIO_RND) { + caps->rng.supported = VIR_TRISTATE_BOOL_YES; + caps->rng.model.report = true; + caps->rng.backendModel.report = true; + + VIR_DOMAIN_CAPS_ENUM_SET(caps->rng.model, VIR_DOMAIN_RNG_MODEL_VIRTIO); + VIR_DOMAIN_CAPS_ENUM_SET(caps->rng.backendModel, + VIR_DOMAIN_RNG_BACKEND_RANDOM); + } + caps->hostdev.supported = VIR_TRISTATE_BOOL_NO; caps->features[VIR_DOMAIN_CAPS_FEATURE_IOTHREADS] = VIR_TRISTATE_BOOL_NO; caps->features[VIR_DOMAIN_CAPS_FEATURE_VMCOREINFO] = VIR_TRISTATE_BOOL_NO; -- 2.49.0

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[PATCH v1 0/1] rpc: Re-read the data if EAGAIN or EINTR were captured
by yong.huang＠smartx.com 14 Apr '25

14 Apr '25

From: Hyman Huang <yong.huang(a)smartx.com> v1: 1. Encapsulate the retry logic inside virNetTLSSession{Read,Write} 2. Use VIR_DEBUG instead of VIR_WARN to log the retry operation rfc: https://patchew.org/Libvirt/d716a59dc2c61916917c6d2e07d62055745606d5.174404… Please review, thanks. Yong Hyman Huang (1): rpc: Add the retry argument for virNetTLSSession{Read,Write} src/rpc/virnetclient.c | 2 +- src/rpc/virnetsocket.c | 4 ++-- src/rpc/virnettlscontext.c | 28 ++++++++++++++++++++++++++-- src/rpc/virnettlscontext.h | 6 ++++-- 4 files changed, 33 insertions(+), 7 deletions(-) -- 2.27.0

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How to find the actually schedulable CPUs in a Linux + cgroups setup?
by Biser Milanov 14 Apr '25

14 Apr '25

Hi, Right now, looking at the QEMU driver, libvirt supports listing all of the present CPUs on the hypervisor via /sys/devices/system/cpu/present. For systems where cgroups with exclusive CPU bits are configured, however, there might be CPUs that are not availabe to libvirt. This leads to situations where a domain cannot be started because of an invalid cpuset attribute (using a CPU with an exclusive bit set). My initial idea was to refactor functions like virNodeGetCPUMap() to take into account cgroup limits. danpb mentioned in #virt (thanks danpb!) that libvirtd might run in a cgroup that is not the one in which VMs will run (like on systemd hosts where libvirtd will run under /sys/fs/cgroup/system.slice/, and VMs under /sys/cgroup/machine.slice/), so just reading hardcoded cgroup files is not a good idea. Is it possible for libvirt to figure out what the actually schedulable CPUs are? Ideally users can then query this information via `virsh nodeinfo` or `virsh capabilities`. --- Regards, Biser

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[PATCH 0/2] vsh: Fix one memleak and const correctness
by Michal Privoznik 14 Apr '25

14 Apr '25

*** BLURB HERE *** Michal Prívozník (2): vsh: Free commands in vshDeinit() vsh: Turn _vshControl::progname into a const string tools/vsh.c | 1 + tools/vsh.h | 2 +- 2 files changed, 2 insertions(+), 1 deletion(-) -- 2.49.0

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[PATCH 1/2] NEWS: bhyve: document new features
by Roman Bogorodskiy 14 Apr '25

14 Apr '25

Document the virtio random number generator device support and <interface type='network'> support. Signed-off-by: Roman Bogorodskiy <bogorodskiy(a)gmail.com> --- NEWS.rst | 14 ++++++++++++++ 1 file changed, 14 insertions(+) diff --git a/NEWS.rst b/NEWS.rst index 4f1e8ecbdf..603c373390 100644 --- a/NEWS.rst +++ b/NEWS.rst @@ -24,6 +24,20 @@ v11.3.0 (unreleased) The following flags are now configurable for Xen: ``vapic``, ``synic``, ``stimer``, ``frequencies``, ``tlbflush`` and ``ipi``. + * bhyve: Support virtio random number generator devices + + Domain XMLs can now include virtio random number generator devices. + They are configured with:: + + <rng model='virtio'> + <backend model='random'/> + </rng> + + * bhyve: Support ``<interface type='network'>`` + + At the moment it doesn't provide any new features compared to + ``<interface type='bridge'>``, but allows a more flexible configuration. + * **Improvements** * **Bug fixes** -- 2.49.0

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